HARRIER BOOK 2

Q5/X451 FATC

DTC Troubleshooting Data

Version: 1.0

Date: 16-Oct-2018

TATA MOTORS Ltd.

This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author.

Author: ERC

Page: 33 of 202

B1F2E-12:- Air Distribution Motor Drive Line– Circuit short to Battery;

ISO Code

B1F2E- 12

Customer Symptom

No air distribution (mode) control (manual or automatic)

Fault Effects (On Vehicle)

If polarity of motor lines is affected by fault, motor will

move to either end stop

Lamp Status (If Any)

Motor To be Disabled

Fault Detection Condition

Mode Door Control Motor Drive Line - Circuit Short to

battery

Normal Operating Condition

With the Mode motor drive line connected to the harness

and with Ignition ON, check the voltage between blue

connector pin no 5 & ground or 21 & ground of the

Connector. The voltage range should be in between 0 to 14

Probable Trouble Area

Motor drive line is shorted to battery

Healing Condition

If there is a continuity between the Motor drive line and

battery line correct the wiring harness (wiring harness short

to battery)

Component Details:

The Mode Door Actuator controls the direction of airflow. It selects which way air flows through the different ducts.

Preliminary Checks:

Switch On the IGN & perform the following check.

Connect the Diagnostics tool & check the DTC fault code

Read ECU parameter value

Target Position of Mode Door Flap

and

Air Distribution Mode Door flap Position

(Internal Value)

for actual and target position of Actuator